you also have to think of the oils in chicken meat..ever seen what happens to the oils when the chicken is cooked, then refrigerated?..it hardens..unless you keep your fish above 95*f..i really would not feed them chicken, or any other animal meat.
i say stick to shrimp, krill, pellets, and whatever fish fillets you can find..why take a chance?
it will also mess with your water if your fish are messy eaters..